Fountain pen



FIG. 1 is a font, top, right side perspective view of a fountain pen showing our new design with a cap;

FIG. 2 is a front view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a left side view thereof;

FIG. 7 is a right side view thereof;

FIG. 8 is a font, top, right side perspective view showing the fountain pen without the cap;

FIG. 9 is a front view thereof;

FIG. 10 is a top view thereof;

FIG. 11 is a rear view thereof;

FIG. 12 is a bottom view thereof;

FIG. 13 is a left side view thereof; and,

FIG. 14 is a right side view thereof. 

CLAIM We claim the ornamental design for a fountain pen, as shown and described. 